📝 Update release notes

Author: github-actions

README.md

@@ -128,6 +128,10 @@ You can start from it and modify it as you need. Here's the [documentation relat
 
 This project is licensed under the terms of the MIT License.
 
+#### Features
+
+* ✨ Add support for multiarch builds, including ARM (e.g. Mac M1). PR [#65](https://github.com/tiangolo/nginx-rtmp-docker/pull/65) by [@tiangolo](https://github.com/tiangolo).
+
 #### Internal
 
 * ⬆ Bump peter-evans/dockerhub-description from 3 to 4. PR [#63](https://github.com/tiangolo/nginx-rtmp-docker/pull/63) by [@dependabot[bot]](https://github.com/apps/dependabot).